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Transmittance Formula:
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The absorbance to transmittance equation converts the amount of light absorbed by a material (absorbance) to the amount of light transmitted through it (transmittance). This is particularly important in glass manufacturing and optical applications where light transmission properties are critical.
The calculator uses the transmittance equation:
Where:
Explanation: The equation shows the inverse logarithmic relationship between absorbance and transmittance. As absorbance increases, transmittance decreases exponentially.
Details: Accurate transmittance calculation is crucial for glass manufacturers, optical engineers, and researchers working with light transmission materials. It helps determine the efficiency of windows, lenses, filters, and other optical components.
Tips: Enter absorbance value (must be ≥0). The calculator will provide both decimal and percentage transmittance values.
Q1: What is the relationship between absorbance and transmittance?
A: Absorbance and transmittance have an inverse logarithmic relationship. As one increases, the other decreases exponentially.
Q2: What are typical transmittance values for glass?
A: Standard clear glass typically has transmittance values between 80-90% in the visible spectrum, while specialized optical glass can have values up to 99.9%.
Q3: Can transmittance be greater than 1 (100%)?
A: No, transmittance represents the fraction of light transmitted and therefore cannot exceed 1 (100%).
Q4: How does glass thickness affect these calculations?
A: The basic equation assumes a standard path length. For different thicknesses, the absorbance value should be normalized to the standard path length used in measurements.
Q5: Are there limitations to this calculation?
A: This calculation assumes the material follows Beer-Lambert law and doesn't account for factors like surface reflections, scattering, or wavelength dependence of absorption.